The device doesn’t do it, it can’t do it… that’s the point.
We discussed this in another thread.
In short…
If the device loses power and is unable to connect to the Internet to access the ewelink cloud, it will not have any settings for “schedule/timer/loop timer”, unfortunately there is nothing you can do about it.
When the device starts, it tries to connect to your Wi-Fi, if it succeeds, it tries to connect to the cloud, and if it succeeds, it downloads the settings and stores them locally. When it later loses Internet connection or even your home WiFi is turned off, the device still remembers the settings for “schedule/timer/loop timer” but if the device loses power for any reason, even for 1 second, all these settings are lost. and the device will not work until it connects to the Internet again and downloads these settings again.
I’m talking about the situation without iHost on the local network. If you have an iHost, theoretically most devices should use local scenes and probably “schedule/timer/loop timer”… But you still need a wifi connection on your home network between the devices and the iHost.